Liner for compressors



July 13, 1954 W. H.` NOBLE LINER FOR COMPRESSORS Filed July 29, 1952 INVENTOR Wf/Vale B l// l I l ATTOR EY Patented July 13, 1954 LINER FOR COMPRESSORS William H. Noble, Easton, Pa., assigner to Pennsylvania Pump & Compressor Company, Easton, Pa., a, corporation of New Jersey Application July 29, 1952, Serial No. 301,433

2 Claims.

VShis invention relates to compressors and more particularly to non-metallic liner for the cylinder oi 'the compressor Within which the DSOII eciprocates A primary object of the invention. is to provide a liner hard carbon for the cylinder of an air or compressor having a metal sleeve to form a bac f therefor, the carbon being bonded to the inner surface of the metal sleeve throughout its entire length.

A feature of importance of the invention is that the metal eieeve may be closely tted within the central portion of the cylinder and fit loosely within the end members forming with the central portion a complete compressor cylinder. By this means the head end of the cylinder may be removed from the compressor without disturbing the liner or the central portion, and the head end may be removed with the central portion of the cylinder from the remainder of the compressor together with the liner.

Another object of the invention of importance therefore is to provide a rigid and sturdy liner that readily may be repeatedly applied to and removed from a compressor and will provide a non-metallic contact with the piston.

With the above and other objects in view, the invention may include the features of construction and operation set forth in the following speciiication and illustrated in the accompanying drawing.

In the accompanying drawing annexed hereto and forming a part of this specication, I have shown the invention embodied in a standard form of air or ges compressor but it `will be understood invention can be otherwise embodied and that the drawing is not to be construed as defining cr limiting the scope of the invention, the claims appended to this specification being relied upon for that purpose.

In the drawing:

Fig. l is a central longitudinal section of an air or gas compressor having the present metal backed liner applied thereto, and

2 is a transverse sectional view taken on the plane of line Z-Z in Fig. l.

ln the above mentioned drawing, there has been shown but one embodiment of the invention which is now deemed preferable, but it is to be understood that changes and modications may be made within the scope of the appended claims without departing from the spirit of the invention.

irieiy, in its preferred aspect, the invention may include the following principal parts: First, a compressor for air and gasses having a Lil) cylinder construction made up of a crank portion, a central portion and a head portion; and second, a liner comprising a metal sleeve fitting within the members forming the cylinder and having a hard carbon relatively thick walled sleeve bonded to its inner surface.

Referring more in detail to the figures of the drawing it will be seen that the cylinder shown in Fig. l comprises a central portion l0, a crank portion I2, and a head portion i4. Each of these portions as shown may be water jacketed in the usual manner by having communicating water jacket spaces formed therein. The crank portion i2 may be bolted directly to the compressor base or frame and the central portion it of the cylinder may be bolted as shown to the crank portion i2 on one side thereof. The head portion Ill of the cylinder is bolted to the opposite side of the central portion it.

The liner for the cylinder comprises a metal sleeve IE closely tting and pressed firmly into the central portion i i! of the cylinder. In length the metal sleeve I6 is long enough to extend into the crank portion l2 and head portion ifi to abut against shoulders formed in these members. For convenience in assembling and disassembling the cylinder components there is provided a slight clearance between the outer surface of the sleeve i6 and the inner wall of the crank portion i2 and head portion I4 of the cylinder.

By means of this clearance the head end may be removed from the compressor without disturb ing the sleeve i6 and liner IS. Also, the head end l 4 may be removed from the compressor with the central portion It of the cylinder and the sleeve i6. If desired also the head end I li may first be removed and then the central portion it of the cylinder and sleeve It may be separately removed. To replace a worn liner it is only necessary after separately removing the head end I6 and central portion l il to press the metal liner I or sleeve from the central portion it' of the cyl inder and press a new sleeve I6 with its carbon liner i8 bonded thereto into the cylinder central portion i0. The central portion, with its new liner, may then be remounted in position on the compressor and the head portion again attached.

To the inner surface of the metal sleeve i6 is bonded or otherwise secured throughout its surface a carbon uniformly thick sleeve or cylinder i8. The inner surface of the carbon sleeve I8 is machined to a dimension to permit slidable movement of the piston 20 with a substantially air or gas tight t between the carbon liner I8 and the piston rings in the piston.

By the provision of this carbon liner the necessity for any form of lubricant for the cylinder Wall is avoided. As the carbon liner I8 is permanently attached to its metal sleeve I6 it may be handled as a metal part and when the carbon becomes worn the metal backing formed by the sleeve I6 may be again provided with a new carbon liner. The length of the carbon surface I3 is such that its entire length is traversed by the piston rings so that the wear of the carbon will be uniform throughout its entire length.

I claim as my invention:

1. A cylinder for an air or gas compressor hav ing a crank portion, a central portion and a headV portion, means to detachably connect said portions in alignment with each other, communicating water jacket spaces in each of said portions, a metal sleeve pressed into said central portion, said sleeve extending from opposite ends of said central portion and freely entering said head and crank portions of the cylinder, said sleeve having its outer surface reduced in diameter at its ends extending Within said head and crank portions, and a carbon liner permanently attached to said metal sleeve throughout the length of its inner surface.

References Cited in the le of this patent UNITED STATES PATENTS Number Name Date 2,246,392 Spreng et al. June 17, 1941 2,412,587 Larson Dee. 17, 1946 FOREIGN PATENTS Number Country Date 23,378 Great Britain Oct. 21, 1899 520,446 Great Britain Apr. 24, 1940 ma Q- 

